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| From | Louison CF <louison.cahenfourot@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Problem while running a simple OLS regression |
| Date | Fri, 24 Feb 2012 20:17:04 +0100 |
Ok, it was so obvious. I do have 6 observations. Thank you very much for your answer ! Louison Le 24 févr. 2012 à 20:07, Austin Nichols a écrit : > Louison CF <louison.cahenfourot@gmail.com>: > Do you have 6 observations? If so, you can't run a regression with 7 > coefs. With 6 coefs, residuals are zero and you will not get SEs. > > On Fri, Feb 24, 2012 at 1:37 PM, Louison CF > <louison.cahenfourot@gmail.com> wrote: >> Hello everyone, >> >> >> Despite my researches I have found nothing helpful yet to solve my problem, so I take the liberty to send an email to statalist. Please excuse me in advance for this question which is probably not the most interesting for advanced stata users. >> >> Here is my problem: I want to run a simple ols regression with 6 variables (dependant variable + 5), and for an unknown reason, Stata does not run the regression when I include all the explanatory variables, but only when I remove at least one of them. I have tried many times with removing alternatively one of my explanatory variables, and it does work no matter which one I remove. As soon as I include all the 5 explanatory variables, it doesn't work anymore and produces such an output: >> >> . reg logco2 emrightaus popaus gdpcapaus enuseaus co2intensaus >> >> Source | SS df MS Number of obs = 6 >> -------------+------------------------------ F( 5, 0) = . >> Model | .021963775 5 .004392755 Prob > F = . >> Residual | 0 0 . R-squared = 1.0000 >> -------------+------------------------------ Adj R-squared = . >> Total | .021963775 5 .004392755 Root MSE = 0 >> >> ------------------------------------------------------------------------------ >> logco2aus | Coef. Std. Err. t P>|t| [95% Conf. Interval] >> -------------+---------------------------------------------------------------- >> emrightaus | -.0002742 . . . . . >> popaus | 4.07e-07 . . . . . >> gdpcapaus | .0000328 . . . . . >> enuseaus | .009534 . . . . . >> co2intensaus | 2.281203 . . . . . >> _cons | 2.930911 . . . . . >> ------------------------------------------------------------------------------ >> >> Only the coefficient column is filled in. I do not understand where this comes from, I have checked my datas and they seem to be perfectly ok. I work with Stata 10.1 for Mac and just did an update-check, it is up-to-date. >> >> I am really blocked here, and any help would be helpful. > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/